Stop-motion for worsted-spinning machines.



L. ROBINSON, STOP MOTION FOR. wons'rm) SPINNING MAGHINBS.

APPLICATION FILED $33517, 1913.

Patented Mar. 16, 1915.

\lg'tiflesse N Ifive'nto-r. fi up. bLutner Robinsrgzim YW Attys.

THE huRRIS PETERS C04. PHOTG-LITHQ. WASHINGTON. D. c.

' Stop Motions for LUTH R ROBINSON, or BOSTON, nnssaonnsn'r'rs, nssrenoa or ONE-HALF T0 orrannns H. zrnmvrnes, or wrnrnnor, MASSACHUSETTS.

STOP-MOTION ron wo'nsrnn-srmnnve Mnonmns.

Specification of Letters Patent.

Patented Mar. 16,1915.

Application filed February 17, 1913. Serial No. 748,831.

To aZZw/wm it may concern: u

7 Be it known that I, LUTHER ROBINSON, a citizen of the United States, residing at Boston, county of Suffolk, State of Massachusetts, have invented an Improvement in lVorsted Spinning Machines, of which the following description,

in connection with the accompanying draw mg, is a specification, like characters on the drawing representing like parts.

This invention relates to stop motions'for worsted spinning machines and has for its object to provide anovel rconstruction'by which when any end breaks the feeding of the corresponding roving to the front rolls will be stopped, but will be started again automatically as soon as the mechanism has been reset, thus facilitating the operation of piecing the broken end.

The features wherein my invention resides will be more fully hereinafter described and then pointed out in the appended claims. j

Figure 1 is a vertical sectional view through a spinning frame having my improvements applied thereto taken on substantially the line 00- -00, Fig. 2; Fig. 2 is a top plan view of the stop motion; Fig. 3 is a sectional view taken on substantially the line y-y, Fig. 2; Fig. 4 is a detail of the gravity-actuated releasing member of the stop motion.

I have shown at l the frame of a worsted spinning machine of usual construction which is provided with the usual front top and bottom rolls 40, 41, the usual top and bottom carriers 3 and 4:, the bottom back roll 7' and the presser roll 6. The roving or yarn 42 is fed from a spool 5 and passes between the back and presser rolls 6 and 7 and thence passes between the top and bottom carriers and between the front top and bottom rolls 40 and 41, the yarn 9 passing through the eye of the thread-board 8 to the bobbin. These parts are such as are usually found in worsted spinning machines and form no part of the present invention.

In applying my invention to the spinnin machine I )rovide a ravit -aCtuated ID 7 a releasing member which is normally held in inoperative position by the member being so arranged that when the yarn breaks the action of gravity thereon will set in motion mechanism which will cause the presser roll 6 to be withdrawn yarn 9, said from the back roll 7 thereby to prevent'further feeding of the roving to the top rolls. The presser roll 6 is journaled in a yokeshaped frame 10 which is yieldingly secured to arocking carrierll that is pivoted in a bearing 12 sustained by the frame '1. The yokeshaped frame 10 is yieldingly connected to the carrier 11, and the construction is such that the yielding connection will cause the roll 6 to bear against the back roll with the desired pressure to effect the feeding of the roving or yarn, and alsosuch as'to cause the presser roll 6 tomove backwardly off from the roll 7 whenever the gravity-actuated releasing member is released by the breaking of a thread. As herein shown, the frame-10 is PIOVIClGCl with a rearwardly-extending arm 13 which overlies a laterally-extending portion 14 projecting from the carrier 11. A bolt 15 extends through the portion 14 and arm 13 and a spring 16 surrounds the bolt. and is confined between the arm 13'and' a nut on the end of the bolt. ,This nut vides means by which the tension of the spring can be adjusted. The construction of the parts is such that when the presser roll 6 is in the full line position F ig. 1, thearm 18 stands at more to the portion 14: and the spring 16 is under moreor lesstension. The parts are held in the full line position by means of an arm 17 which is rigid with the carrier 11 and extends rearwardly'therefrom and which engages a positioning member 18 that is normally held in the full line position Fig. 1

so long as the roving is intact: When the positioning member is in the full line position, it will by its engagement with the arm. 17 serve to hold the carrier 11in the full line position Fig. 1 and when the car- .rier'is in this position the-presser roll 6 is in operative engagement with the feed roll 7, and the spring'16 operates to apply the j necessary pressure to the presser roll to cause In the presentembodiment of my invention the positioning member 18 is in the form ofga rod or bar and the end 20 thereof bent at a Slight angle and extends loosely end of a holding lever 22 which in turn is pivoted at its lower end, as at 23, to a racket 24 that is secured to the portion 25 of the frame. The holding lever 22 1S normally 1 held in its operative position by means of a catch 39 which is provided with shoulder 30 adapted to engage the holding member, said catch being secured to the bracket So long as the holding member engages the catch and is maintained in its full line position Fig. l the positioning member 18 will be in its operative position and will, therefore, maintain the presser roll 6 in operative engagement with the feed roll 7.

26 designates a gravity-actuated releasing member in the form of a lever which is pivoted at 27 and is provided with the curved extension 28 having a releasing finger 29 extending laterally therei'rom.

The pivot 27 of this gravity-actiuited member 26 is in the form of a pin which stands at a slight angle to the vertical, as shown best in Fig. 3, so that vhen the member 26 is allowed free movement it will swing in a general horizontal direction, but at a slight inclination, due to the inclination of the pivot pin 27. This general horizontal direction is one which I will refer to as a lateral direction, it being lateral to the vertical direction of the yarn. The term laterally swinging as hereinafter used is, therefore, intended to describe the lateral swinging movement in a general horizontal plane. lV hen the parts are in the full line position Fig. 1, the holding lever 22 rests i the notch 30, and this notch holds the actuator in this position and thus holds the presser roll in its operative position, as above described. Under these normal conditions the outer end of the gravity-actuated member 26 rests against the yarn 9, as shown in Figs. 1, 2 and l, and so long as the yarn is intact it will hold the member in this position. Owing to the slight inclination of the pivotal pin 27 a very slight force is sufficient to hold the member 26 in the full line position Figs. 2 and l. If the yarn 9 breaks, however, then the member 2'6 swings around into the dotted line position Fig. 4:, and in doing so the releasing finger 29 engages the holding lever 22 and forces the latter out from the notch 30. As soon as the lever 22 is released from the notch 30 the positioning member 18 will move into the dotted line position Fig. 1, the lever 22 swinging backwardly during such movement. This movement of the positioning member 18 results partly from the action of gravity on said member and partly from the action of the spring 16. It will be remembered that this spring 16 is under more or less tension when the presser roll 6 is in its operative position shown in full lines Fig. 'l, and that the expansive force of the springtends to shut the arm 13 down against the portion 1%. As soon as the support for the arm 17 is removed, then the spring 16 tends to expand and to bi 'ng the arm 13 into substantial parallelism *a' h the portion i l, but this relation of the parts can only be secured by the frame ll swinging backwardh thereby to draw the presser roll 6 from the feed roll 7. The force of the spring 10 sufi'icient to overcome the action of gravity on the roll 6 and yoke 7, and-to move the parts into the dotted line position Fig. 1 as soon as the positioning memoer 18 is moved into its dotted line position Fig. 1. 'lhc spi Y 1G is still under more less tension at the parts have assumed their dotted line position, the tension being sui'licient to even come the action of gravity and to hold the parts in said dotted line position. ll hen the presser roll is in its inoperative or dotted line position Fig. 1, it rests on the support 19, and by its engagement therewith still holds the arm 13 slightly separat d -from the portion 1i and the spring 1 tension. Moreover, when the presser roll thus in engagement with the support 19 i holds the roving between itself and the support, thus preventing the roving rom being fed "forward by the top rolls.

The restoring of the releasing member 26 to its operative position again will automatically restore all the other parts, including the aresser roll 6, positioning member 18 and lever 22, to their operative position, and this operation will cause the feeding of the roving to start automatically. It will be noted that the releasing member 26 is provided with the curved extension 28 which has continuous engagement with the lever so that when the releasing member is swung from its dotted line position Fig. 4t to its full line position, the portion 28 there of acts on the lever 22, swinging the lever forwardly, and thus restoring the positioning member 18 to its full line position. ho bringing of the member 18 into this line position operates to restore the pre 1 roll 6 to its operative position. As soon as the presser roll comes into contact with the back roll 7, the "feeding of the roving will immediately commence and as soon as this occurs, the broken end will be "fed forward from between the front rolls 4:0 an l. Whenever any end breaks the to ding o roving is automatically stopped, as 2'6 described.

The operation of piecing the end starting the parts in operation volves merely the act of swinging leasing member 26 from its dotted it full line position Fig. e, and the simple act full that involved in the above of grasping the broken end as it emerges from the front rolls after the feeding of the roving has started up and the piecing of this end with the broken end leading to the bobbin. This is a simple operation which can be quickly accomplished. One of the important features of the invention is operation, that is, when an end breaks the feeding of the roving immediately stops, while as soon as the releasing member is returned to its normal position the feeding of the roving automatically starts again, thus allowing the opera tor to piece the broken ends.

have provided a restoring member which can be used for restoring all of the releasing members to their normal position simultaneously. This restoring member is i in the form of a bar 32 which extends the length of the frame and is'situated behind the lever 22 and is connected to an actuator 33 in the form of a bell-crank lever pivoted to the frame at 34. This bell-crank lever is provided with a handle 81 by which it can be turned. This restoring member is used in the event of starting or stopping the ma chine when it is desired to restore all of the releasing members to their normal position simultaneously.

Vfhile I have illustrated one embodiment of my invention 1 do not wish to be limited to the constructional details illustrated.

Having fully described my invention, what I claim as new and desire to secure by Letters Patent is 1. In a stop motion for spinning machines, the combination with a feed roll, of a movable carrier, a presser roll carried by said carrier and adapted to engage the feed roll, a spring connection between the presser roll and carrier, means to hold the carrier in operative position with the presser roll in engagement with the feed roll, and means to release the carrier when the yarn breaks, said spring connection operating to hold the presser roll yieldingly against the feed roll when the carrier is in operative position and to swing the carrier into a position to remove the presser roll from the feed roll when the carrier is released.

2. In stop motion for spinning machines, the combination with a feed roll and a movably-mounted presser roll co-acting therewith, of a carrier for supporting the presser roll, said carrier having a rearwardly-extending arm, a positioning member situated beneath said arm and adapted when in its operative position to engage said arm and hold the carrier in its operative position with the presser roll in engagement with the feed roll, means to release the positioning member when the yarn breaks to allow it to move into an inoperative posi tion, and a spring connection between the presser roll and the carrier which yieldingly holds the presser roll against the feed roll when the carrier is in operative position and acts to move the carrier into inoperative position when the positioning member is released.

3. In a stop motion for spinning machines, the combination with a feed roll, of a presser roll, a carrier for the presser roll having an arm, a positioning member normally engaging said arm and holding the presser roll in its operative position, a lever connected to said positioning member, a catch to hold the lever and positioning member in their operative positions, and a releasing member mounted to swing about an inclined axis and normally held inoperative by the yarn but adapted when the yarn breaks to swing bygravity and cause the lever to be released from the catch.

4. In a stop motion for spinning machines, the combination with a'feled roll, of a presser roll, a carrier for the presser roll having an arm, a positioning membervnormally engaging said arm and holdingv the presser roll in its operative position, a lever connected to said positioning member, a catch to hold the lever and positioning memher in their operative ositions and a ravity-actuated releasing member mounted to turn about an inclined aXis and normally held inoperative by the yarn but adapted when the yarn breaks to swing by gravity and cause the lever to be released from the catch,

5. In a stop motion for spinning machines, the combination with a feed roll, of presser roll, a carrier for the presser roll having an arm, a positioning member normally engaging said arm and holding the presser roll in its operative position, a lever connected to said positioning member, a catch to hold the lever and positioning member in their operative positions, and a laterally-swinging gravity-actuated releasing member mountedto turn about an inclined axis and normally held inoperative by the yarn but adapted when the yarn breaks to cause the lever to be released from the catch.

6. In a stop motion for spinning machines, the combination feed roll, a presser roll co-acting therewith, means normally holding the presser roll in its operative position, a laterally-swinging gravity-actuated releasing member mounted to turn about an inclined axis and adapted normally to engage the yarn as it leaves the top rolls and held in inoperative position thereby, said releasing member operating when the yarn breaks to mitting the presser roll to move out of engagement with the feed roll.

7. In a stop motion for spinning machines, the combination with top rolls, of a feed roll, a'presser roll co-acting therewith,

with top rolls, of a release the positioning member thereby permeans normally holding the presser roll in its operative position, a horizontallyextend ing releasing member normally engaging the yarn as it leaves the top roll and mounted to turn about an inclined axis, said releasing member swinging by gravity when the yarn breaks thereby releasing the position ing member.

8. In a stop motion for spinning machines, the combination with a feed roll, of a presser roll co-acting therewith, a pair of front rolls situated on the delivery side oi the feed roll, means norm lly maintaining the presser roll in operative engagement with he feed roll, laterally-s ringing gravity-actuated member normally engaging the yarn on thedeliyery side of the "front roll and held in inoperative position thereby, said member being operated by gravity when the yarn breaks to render inoperative said means and an antomatically-operative device to yieldingly hold the presser roll in engagement with the feed roll and to move the pr et" roll backward out of engagement with the feed roll when said means are rendered inoperative.

9. in a stop motion for spinning machines, the combination with a feed roll, of a presser roll co-aeting therewith, a pair of front rolls situated on the delivery side of the feed roll, means normally maintaining the presser roll in operative engagement with the feed roll a laterally swinging gravity-actuated member normally engaging the arn onethe delivery side of the front roll and held in inoperative position thereby, said member being operated by gravity Copies of this patent may be when the yarn breaks to render inoperative said means an antomatically-operative device to yieldingly hold the presser roll in 1 engagement with the feed roll and to move the presser roll backward out of en"agement with the feed roll when said means rendered inoperative and a rest on which the presser roll is supported when it is in its 15 backward position.

10. In a stop motion. for spinning macli cnes the combination with a feed roll, oi a rest in the of feed roll, a swinging carrier pivotally mounted adjacent said to rest and provided with a rearwardly-extending portion yoke having a rearwardly- [n arm overlying said rearwardlyportion, a spring connection betw en said and portion, a presser carried by said yoke and yieldingly held either in engagement with said teed roll in engagement with s rest depending on the posni of the can er means normally holding the carrier in its operati position with the presser roll in engagement with the feed roll, and means to release said latter means when the yarn breaks, sail sp rig connection acting to move the presser roll rearwardly onto the rest when said means are released in testimony whereof, i have signed my name to this specification, in the presence of two subscribing witnesses.

LUTHER ROBINS-O l? Witnesses LoUrs Q. SMITH, Bsnrrm Hnnsnn.

obtained for five cents each, by addressing the fiemmissioner of ZPatents Washington, D. G. 

